Shuttle and bobbin guard



Nov. 23 1-926. 7 1,608,189

I. SNOW SHUTTLE AND BOBBIN QUART).

Filed Oct. 51. 1923 2 Sheets-Sheet 1 31 I 32 C/ I a I -S S F :57 2' W H F .2 HT K 32 7 $0 I /H 51R Fig.4-

WITNESS: INVENTOR.

ATTORNEY.

Nov. 23 1926. 1,608,189

I. SNOW SHUTTLE AND BOBBIN GUARD Filed (Jet. 31 1923 2 Sheets-Sheet 2 v 81" Fi .8. I 9" v N 60 EMU 7 gin so; QM U I] 7 .10 v 5 .11;

I N V EN TOR.

ATTORNEY.

Patented Nov. 23, 1926.

UNITED STATES 1,608,189 PATENT OFFICE.

ISAAC, SNOW, OF LAWRENCE, MASSACHUSETTS.

snnr'rnn AND Bo Brn GUARD.

Application filed October 31, 1923. Serial No. 671,877.

This invention relates to looms and is particularly adapted for; weft replenish ng looms wherein a bobbin is forced into spring jaws in a shuttle which has no spindle.

Substantially all looms include a laybeam on which is the race for the shuttle. This lay-beam carries a reed on the top of which is a reed cap. Extending, out from the reed cap over the lay-beam is a shuttle guard, the purpose of which is to prevent the shuttle from flying upward out of the loom as it sometimes has a tendency to do.

IVith a weft replenishing loom it occasionally happens that when the bobbin 1s forced by the hammer, into the jaws of the shuttle, it does not function accurately and the tip sticks up over the top of the shuttle in a position where it is likely to strike the war Vt lien this occurs, the projecting bobbin may cause a smash, or rip out a great many warp threads as it is thrown along the laybeam.

The purpose of this invention is to provide a shuttle guard which also serves as a bobbin guard. In my device, if the tip of the bobbin projects above the top of the shuttle and into the warp it will strike one of a plurality of transverse members form ing a part of the guard and will be stopped, thereby stopping the shuttle before much, if any, damage is done. I

The warp is usually so elastic that no threads are broken but in any event, only a few are broken.

In the drawings, Fig. 1 is a side elevation showing part of a lay-beam with a reed and reed cap attached, together with the warp, shuttle, harnesses, etc.

Fig. 2 is a front elevation showing part of the lay-beam with my guard attached and the bobbin projecting up from a shuttle. I

Fig. 3 is an enlarged front elevation showing one'type of my guard.

Fig. 4c is a bottom view of Fig. 3.

Fig. 5 is a bottom view of another modi fication of my guard.

Fig. 6 is a sectional elevation on line 77 of Fig. 5. Fig. 7 is a front elevation of Fig. 5. Fig. 8 is a front elevation of a simple form of my guard adjusted so that its fins project down through the warp.

Fig. 9 is a front elevation of another modification.

I Fig. 10 is a bottom view of the guard shown in Fig. 9.

Fig. 11 is a bottom view of another modie fication. Y

Fig. 12 is a plan view of another modifiv cation.

Fig. 13 is a side elevation showing my device with an old type of shuttle guard.

In the drawings A and A represent-the harnesses of a loomthrough which the warp threads W andW pass from'the' warp L through the reed C to the cloth 0.

B is the lay-beam horizontally along the top of which is the race 11 for the shuttle S which carries the filling P through the warp.

The reed C is carried by the lay beam and supports reed cap 10 in a well known manner.' This reed cap 10 does not extend entirely over the shuttle race 11 nor over the width of the shuttle when in the race.

In Figs. 1, 2, 3,4, H represents one form of my device consisting of a strip of sheet metal which extends horizontally along the lay-beam over the lay and is fastened along one edge to the reed cap. I show this fastoning means as ears in which are vertical slots 31 through which pass adjusting screws 33 by which it can be raised or lowcred.

This guard may conveniently be constructed by forming fins 32 by bending or crimping the material cross-wise or transversely. Preferably also at the bottom ends of these fins or crimps, the metal is upset as at 34 so that when the tip of the bobbin strikes, it will not slip off side-ways.

In Figs. 5, 6, 7 I show a modified construction in which is used a metal strip 60 which is preferably bent longitudinally at a slight angle along its inner edge 63 and at a right angle 64 at outer edge. To form the downwardly projecting transverse members or fins 62, the metal'is cut out as shown in 61 and bent ata right angle so that these fins project downwardly from the guard. The bent outer edge 64, prevents the bobbin tip from slipping off sideways.

In Fig. 10, I show a similar construction with the guard M wherein the edges are not bent but the fins are cut out from the metal at 51 and the guard M is so adjusted that .these fins as shown in Fig. 8 stick down through the top warp threads W As these are thin and the warp is continually moving along, no harm is done to it and the fins can be adjusted sou-as to be very close to the shuttle. j j V In Fig. 9 my guard 41 is bent or waved to form transverse members 40. i

In Fig. 11 I show a guard formed like a ladder with the side members 60, and cross members 61, which project downward.

In Fig. 12 I show a guard R which consists of a flat piece of metal with members 70 the edgessot' which arebent down and which project in towards the reed Cap 10 to which the guard is fastened by arrnsil.

With this construction, either the yarn mass on bobbin 'F, or the tip '20 willstrike a hand threading shuttles,

bracket form riveted at Slto my guard and having vertical adjusting slots 82 for supporting screws 33 in addition to the end supports.

It is obvious that my guard could be made in a single length or in several lengths and that it could be used on a loom in which having bobbin spindles, were used. Ijclaim z '1 The combination; with a Weft {replenish-j ing looni having ajreedcap carriedby its lay-beam, fof a shuttle I and bobbin guard consisting of a horizontal metal strip having spaced transverse fins projectingtdownward therefrom and fastened at one edge tothereedeap so as to extend horizontally along the lay-beamqover thelayandhaving 7 g 1 M downward. r 

